Bortivier Kv4p HT Homebrew VHF Radio Android Phone Into Ham Radio Transceiver PCB V2.0 SA818-V SA818S Radio Module

Crystal-clear 22kHz 8-bit ADC/ audio, with filters and squelch. It's small enough to fit in your pocket and take anywhere, and since it has no internal battery it's the perfect radio to put in a go-bag or your car's glove compartment. The radio simply plugs into the USB C port on your Android smartphone and transforms it into a fully-fledged handheld radio transceiver. kv4p HT is a homebrew VHF radio that makes your phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license. Texting with notifications just like SMS - radio-based APRS messaging (not just location) with built-in 1200 baud modem.